<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity {

    /**
     * Authenticates a user.
     * @return boolean whether authentication succeeds.
     */
    public function authenticate() {
        $user = User::model()->find('LOWER(username)=?', array(strtolower($this->username)));
        if ($user === null)
            $this->errorCode = self::ERROR_USERNAME_INVALID;
        elseif (!$user->validatePassword($this->password))
            $this->errorCode = self::ERROR_PASSWORD_INVALID;
        else
            $this->errorCode = self::ERROR_NONE;
        return !$this->errorCode;
    }

}